Dreaded p1153
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Joined: Jul 2020
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From: Fort Smith, Arkansas
Dreaded p1153
Hey there everyone, I've got a bit of a head scratcher I could use some help with. I've got an 03 auto, car runs great with mild bolt ons and tune. Since doing my headers, I've repeatedly had p1153 come up and throw a code. I ignored it until recently when I replaced my o2's with adapters and new rear sensors in the front. Well today the code came back again. I've checked for exhaust leaks at the headers but they seem fine. I've gone through some of the grounds and cleaned them up.
On the drivers side, the plug had actually melted on the harness side, so I replaced it while swapping to the new sensors, the passenger pigtail was undamaged
On the drivers side, the plug had actually melted on the harness side, so I replaced it while swapping to the new sensors, the passenger pigtail was undamaged
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Joined: Sep 2013
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From: Cape Coral, Florida
Once the OEM exhaust manifold is replaced with headers and not knowing how far back the O2 sensors are now located may lead to the O2’s become “lazy” but maybe your tuner may help you at least turn off the MIL...the OEM exhaust manifolds flow pretty well so that’s why I’d never install headers...not worth it !!
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Joined: Jul 2020
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From: Fort Smith, Arkansas
I had a buddy at work hook up his scan tool and the o2s both seemed to be working normally. I'm just gonna have my tuner disable it from throwing the light anymore. I was just under the assumption that using the rear sensors in the front locations would alleviate the code
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,628
Likes: 4,071
From: Cape Coral, Florida
I had a buddy at work hook up his scan tool and the o2s both seemed to be working normally. I'm just gonna have my tuner disable it from throwing the light anymore. I was just under the assumption that using the rear sensors in the front locations would alleviate the code
Last edited by C5 Diag; May 15, 2021 at 07:21 AM.
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Joined: Jul 2020
Posts: 66
Likes: 15
From: Fort Smith, Arkansas
this is with brand new rear o2s in the front locations
